Treat with disdain is an expression that means to show contempt or disrespect for someone or something. The crossword solutions for this term are SPURN (5 letters), SNUB (4 letters), ABUSE (5 letters), SCORN (5 letters), and SNOOT (5 letters). SPURN means to reject or refuse something, while SNUB means to ignore or slight someone. ABUSE is to use something in a wrong or harmful way, and SCORN is to express contempt or ridicule. Finally, SNOOT is to act in a superior or haughty manner. All of these words describe ways to treat someone or something with disdain.